Shimano Dura Ace RT-CL900 - 140mm | Center Lock Disc Brake Rotors The asymmetric shape is specific

The asymmetric shape is specific to monoblock caliper designs and will not fit standard two-piece calipers

no trimming or custom cutting required

For riders who treat a build as a long-term investment

and XC racers who want a compact backup tool or a minimal primary option for shorter rides where big mechanical issues are unlikely

entry-level mountain bikes

Shimano Dura Ace RT-CL900 - 140mm | Center Lock Disc Brake Rotors The asymmetric shape is specificWhy Run the Shimano Dura Ace RT CL900 140mm on Your Road Bike? The Shimano Dura Ace RT CL900 140mm carries the same three technology stack as the 160mm flagship: ICE TECHNOLOGIES FREEZA (three layer stainless aluminum stainless sandwich with extended radiator fin), the Dura Ace exclusive 3D Aluminum carrier engineered to resist heat deformation and prevent rotor runout noise, and heat dissipation paint for additional thermal performance. The 140mm